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### 27 Cards in this Set

• Front
• Back
 I am the side opposite the right angle in a right triangle. What am I? I am the hypotenuse of a right triangle. I am a triangle with three equal (congruent) sides and three equal (congruent) angles. What am I? I am an equilateral triangle. I am the point of intersection of the three axes of a triangle. What am I? I am the circumcenter of a triangle. I am any one side of the triangle. Usually I am the side the triangle is resting upon. What am I? I am the base of the triangle. I am the point of intersection of the three altitudes of a triangle. What am I? I am the orthocenter of a triangle. I am a perpendicular line drawn through the midpoint of a side. What am I? I am the axis of a triangle. I am a triangle in which the two equal sides form a right angle. What am I? I am an isosceles right-angled triangle. I am formed by two sides drawn from a common endpoint. A triangle has three of me. What am I? I am the angle of the triangle. I am the point of intersection of the three bisectors of a triangle. What am I? I am the incenter of a triangle. I am the plane limited by the sides of the triangle. What am I? I am the area of the triangle. We are the sides of a right triangle that form the right angle. What are we? We are the legs of a right triangle. I am the line drawn from any one vertex of a triangle to the midpoint of the opposite side. What am I? I am the median of a triangle. I am the point at which the medians intersect. Wht am I? I am the centroid of a triangle. I am a triangle that has three angles that measures between zero degree and 90 degrees. What am I? I am an acute triangle. I am a triangle with no equal sides and a right angle. What am I? I am a scalene right-angled triangle. I am a triangle with no equal sides and an obtuse angle. What am I? I am a scalene obtuse-angled triangle. I am a triangle with no equal sides and all acute angles. What am I? I am a scalene acute-angled triangle. I am the distance around the triangle. What am I? I am the perimeter of a triangle. I am a triangle with two equal (congruent) sides. What am I? I am an isosceles triangle. I am a triangle with two equal sides and all acute angles. What am I? I am an isosceles acute-angled triangle. We are the line segments that form the triangle. What are we? We are the sides of the triangle. I am a triangle that has one angle that measures exactly 90 degrees. What am I? I am a right triangle. I am a triangle with no equal (congruent) sides. What am I? I am a scalene triangle. I am the common endpoint of two sides. A triangle has three of me. What am I? I am the vertex of a triangle. When there are more than one of me, we are called vertices. I am a triangle that has one angle that measures between 90 degrees and 180 degrees. What am I? I am an obtuse triangle. I am the line from any one vertex drawn perpendicular to the opposite side, extended if necessary. What am I? I am the altitude of a triangle. I am a triangle in which the two equal sides form an obtuse angle. What am I? I am an isosceles obtused-angled triangle.