Geometry Test Triangle Relationships

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. It is parallel to the third side and its length is half the length of that side.

Front

If a triangle has a midsegment of length 4, what is the length of the side it is parallel to?

Back

The length of the side it is parallel to is 8, since the midsegment is half the length of that side.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

If m<LJK = 28°, what is m<MLK if they are base angles of an isosceles triangle?

Back

m<MLK = 28° (base angles are equal).

Front

What is the definition of a perpendicular bisector?

Back

A perpendicular bisector is a line that divides a segment into two equal parts at a 90-degree angle.

Front

If PQ is the perpendicular bisector of MN, what can be said about the segments MP and PN?

Back

MP = PN (the segments are equal in length).

Front

What is the measure of an unlabeled angle in a triangle if the other two angles are 90° and 82°?

Back

The measure of the unlabeled angle is 8°, since 180° - (90° + 82°) = 8°.

Front

What is the formula to find the length of a midsegment in a triangle?

Back

The formula is: 2(midsegment) = length of the opposite side.

Front

If the measure of angle A is 56° in triangle ABC, what is the measure of angle B if angle C is 90°?

Back

Angle B = 34° (since 180° - (56° + 90°) = 34°).

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet; they are always the same distance apart.