M2 U6 Triangle Properties Review

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

What is a midsegment in a triangle?

Back

A midsegment is a line segment that connects the midpoints of two sides of a triangle.

Front

How do you classify triangles by angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).

Front

How do you classify triangles by sides?

Back

Triangles can be classified as scalene (no sides equal), isosceles (two sides equal), or equilateral (all sides equal).

Front

What is the formula for finding the length of a midsegment?

Back

The length of a midsegment is half the length of the third side of the triangle.

Front

If angle A is 68 degrees, what is the measure of angle B if angle C is 80 degrees?

Back

Angle B = 180 - (Angle A + Angle C) = 180 - (68 + 80) = 32 degrees.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

If y + 10 = 20, what is the value of y?

Back

y = 20 - 10 = 10.

Front

If x + 8 = 16, what is the value of x?

Back

x = 16 - 8 = 8.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90 degrees.