Cortez - Isosceles Triangles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is the property of angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are also equal.

Front

How do you find the missing angle in an isosceles triangle?

Back

To find the missing angle, use the fact that the sum of all angles in a triangle is 180 degrees.

Front

If two angles of an isosceles triangle are 70 degrees, what is the value of the third angle?

Back

The third angle is 40 degrees (180 - 70 - 70 = 40).

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is given by the formula: Area = 1/2 * base * height.

Front

If the base of an isosceles triangle is 10 cm and the height is 8 cm, what is the area?

Back

The area is 40 cm² (Area = 1/2 * 10 * 8 = 40).

Front

What is the relationship between the sides and angles in an isosceles triangle?

Back

The larger the angle, the longer the side opposite to it.

Front

If the equal sides of an isosceles triangle are each 5 cm and the base is 6 cm, can it form a triangle?

Back

Yes, it can form a triangle because the sum of the lengths of any two sides must be greater than the length of the third side.

Front

What is the vertex angle in an isosceles triangle?

Back

The vertex angle is the angle formed by the two equal sides.

Front

If the vertex angle of an isosceles triangle is 40 degrees, what are the base angles?

Back

The base angles are each 70 degrees (180 - 40 = 140; 140/2 = 70).