LESSON4- TRIANGLES


CHOOSE THE PROPER WORD

Base angles are CONGRUENT/SIMILAR.

 

The sum of the measures of any two SIDES/ANGLES in triangle is greater than the measure of the third SIDE/ANGLE.

 

The longest side of a triangle is ADJACENT/OPPOSITE to the largest angle.

 

A MEDIAN/ALTITUDE goes through a vertex of triangle and midpoint of the opposite side.

FILL IN THE GAPS

Measures of the three exterior angles in triangle add up to .................... .

 

If two altitudes of triangle are congruent then the triangle is ................... .

LABEL TRUE OR FALSE

All medians in triangle are concurrent. (T/F)

 

In triangle the angles opposite the congruent sides are congruent. (T/F)

 

Angle bisectors divide each other in the ratio 2 : 1. (T/F)

 

The measure of an exterior angle of a triangle is equal to the sum of the measures of the remote interior angles. (T/F)

Say, if the sentence is true always/ sometimes/ never.

The acute angles of a right - angled triangle are complementary.

 

A triangle contains two obtuse angles.

 

The median to a side of triangle divides the triangle into two congruent triangles.

 

If the sides of a triangle are doubled, each angle of a new triangle is twice as large as the corresponding angle of the first triangle.