Unit 4: Triangles Review

Front

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

Back

180 degrees

Front

If one angle in a triangle is 60 degrees and another is 90 degrees, what is the third angle?

Back

30 degrees

Front

What is the formula for the perimeter of a triangle?

Back

Perimeter = side1 + side2 + side3

Front

In a triangle, if two sides are equal, what type of triangle is it?

Back

Isosceles triangle

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

What is the value of x if the angles in a triangle are 40 degrees, 60 degrees, and x degrees?

Back

x = 80 degrees

Front

How do you find the length of a side in a triangle using the sine rule?

Back

a/sin(A) = b/sin(B) = c/sin(C)

Front

What is an equilateral triangle?

Back

A triangle with all three sides and angles equal.

Front

If the lengths of two sides of a triangle are 5 and 12, what is the maximum length of the third side?

Back

The maximum length is less than 17 (5 + 12).

Front

What is the area of a triangle with a base of 10 and a height of 5?

Back

Area = 1/2 * base * height = 25.