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10 Cards in this Set
- Front
- Back
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5 15 -- = -- x 12 |
x* 15 = 5 * 12 15x = 60 --- --- Divide each side be 15. 15 15 x = 4 |
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9 90 -- = --- 5 ? |
Becomes: 9 90 -- = --- 5 x 5 * 90 = 9 * x 450 = 9x ---- --- 9 9 50 = x 50 = ? |
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25 x --- = --- x 1 |
x * x = 25 * 1 x2 = 25 |
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x + 23 = 2x + 45 |
x - x + 23 = 2x - x + 45 Subtract x from each side 23 = x + 45 23 - 45 = x + 45 - 45 Subtract 45 from each side -22 = x Answer x = -22 |
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Equilateral triangle :
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the lengths of all three sides of the triangle are equal, then it is called an equilateral triangle. Figure 2.3 shows an equilateral triangle. |
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Isosceles triangle : |
If only two sides of a triangle are equal in length, it is called as an isosceles triangle. Figure 2.4 shows an isosceles triangle. |
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Scalene triangle: |
If all the sides of a triangle have different lengths it is called a scalene triangle. Figure 2.5 shows a scalene triangle. |
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Acute triangle : |
A triangle in which all the angles are acute, ( i.e. < 90 ) is called as an acute triangle. Figure 2.6 shows an acute triangle. |
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Obtuse triangle : |
A triangle in which one of the angles is obtuse is called as an obtuse triangle. Since the sum of all the angles of a triangle is 1800 it can be said that the other two angles of an obtuse triangle are acute. |
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Right Triangle: |
It is a triangle in which one of the angles is a right angle. Since Ð KJL is 900 it can be said that Ð JKJL and Ð JLK are complementary. In a right triangle the side opposite to the right angle is called the hypotenuse. |
