Flashcard Isosceles and Equilateral 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 an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal to 60 degrees.

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

If two angles of a triangle are equal, what can be said about the triangle?

Back

The triangle is isosceles.

Front

In an isosceles triangle, if the equal sides are each 10 cm, what is the minimum possible length of the base?

Back

The minimum possible length of the base is greater than 0 cm.

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 8 cm and the height is 5 cm, what is the area?

Back

The area is 20 cm².

Front

In an equilateral triangle, if one side measures 6 cm, what is the perimeter?

Back

The perimeter is 18 cm.

Front

What is the relationship between the angles in an equilateral triangle?

Back

All angles in an equilateral triangle are equal and measure 60 degrees.

Front

If the angles of a triangle are 24°, x°, and y°, what is the equation to find x and y?

Back

24° + x + y = 180°.