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36 Cards in this Set
- Front
- Back
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the area of a circle is equal to?
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(TT)r^2
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circumference of a circle is equal to?
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(TT)d or 2(TT)r
the lenght of the entire outer edge of the circle. |
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what is a chord?
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a line connecting any 2 points on a circle.
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what is an ARC?
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the rounded portion of the circle between points A and B.
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whats inscribed mean?
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a triangle is inscribed inside a semi-circle when one of its sides is the diameter of the circle itself, with the other two sides meeting at any point in the circle itself. a triangle inscribed inside a semi-circle is always a right triangle.
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when is the pythagoean theorem used and what does it state.
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used on right triangles.
states that the hypothenuse squared is equal to the sum of the legs squared. a^2 + b^2 = c^2 |
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what is the ratio of a right triangle?
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3:4:5
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what is the ratio of 45° -45° -90° triangles?
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1:1: √2
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what is the ratio of 30° -60° -90° triangles
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1: √3 : 2
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what is the altitude of a triangle?
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a line drawn perpendicular from the vertex.
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what is the base of a triangle?
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the opposite from the vertex where the altitude meets the triangle.
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how to find area of a triangle?
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altitude X base
---------------- 2 |
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find perimeter of a rectangle.
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add each side
or 2(x) + 2(y) where x & y are sides of the rectangle. |
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find area of a rectangle?
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side X side = area
or y X x = area |
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diagonally rectangles are ____?
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equal length
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find the area of a trapazoid?
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1/2 (sum of bases) (height)=area
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a polygon with 4 sides is a
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Quadralateral.
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a quadralateral in which both pairs of opposite sides are parallel is a ?
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parallogram.
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the opposite sides of a parallelogram are _____ lenght.
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equal lenght.
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what is a chord?
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two endpoints located on the circle.
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find circumference of a circle?
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TT(d)
or 2(TT)r |
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find area of a circle?
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(TT)r^2
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formula to find number of degrees in an arc if you have the length of the arc.
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x
--- 360 where X=length |
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a line that has exactly 1 point in come with a circle is said to be?
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Tangent to the circle.
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A point where a line and a circle briefly meet is called a?
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point of tangency.
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tangent lines are usually?
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perpendicular to the circle.
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If each vertex of a polygon lies on a circle, the polygon is?
And the circle is? |
inscribed in the circle.
circumscribed about the polygon. |
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If each side of a polygon is tangent to a circle, the polygon is said to be?
And the circle is said to be? |
circumscribed to the circle.
inscribed in the polygon. |
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If a triangle is inscribed in a circle and one of its sides is equal to the diameter of the circle what kind of triangle is it?
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a right triangle.
(with the hypotenuse equaling the diameter.) |
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a rectangular solid has
faces? edges? vertices? |
6 faces
12 edges 8 vertices |
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the surface area of a rectangular solid is?
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the sum of all the faces areas.
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how to find the area of 1 side of a rectangular solid?
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same as a rectangle.
(height)(width)=area |
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The volume of a rectangular solid is?
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(length) (width) (height)=volume
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The surface area of a right cirular cylinder with a base of r and a height h is?
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2(TT)r^2 + 2(TT)rh =surface area
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find the volume of a right circular cylinder is?
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(TT)(r^2)(h) = volume
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how do you divide fractions?
3/5 / 4/9 |
invert the second fraction and multiply.
3/5 x 9/4 =27/20 |
