4-7 Isosceles (Reg)

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

The angles opposite the equal sides are also equal.

Front

How do you find the height of an isosceles triangle?

Back

The height can be found by drawing a perpendicular line from the vertex opposite the base to the midpoint of the base.

Front

What is the formula for the area of an isosceles triangle?

Back

Area = (base * height) / 2.

Front

If the equal sides of an isosceles triangle are 10 cm and the base is 8 cm, how do you find the height?

Back

Use the Pythagorean theorem: height = √(10^2 - (8/2)^2) = √(100 - 16) = √84.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of any triangle is 180 degrees.

Front

In an isosceles triangle, if one angle is 40 degrees, what are the other two angles?

Back

The other two angles are each 70 degrees.

Front

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

Back

The larger the angle, the longer the opposite side.

Front

How do you determine if a triangle is isosceles using side lengths?

Back

If two sides are of equal length, the triangle is isosceles.

Front

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size, meaning all corresponding sides and angles are equal.