On a piece of paper, use a protractor to construct a triangle with angle measures of 20° and 30°.

select from the drop-down menu to correctly classify the triangle.

a triangle with angle measures of 20° and 30° is an acute, obtuse, or right triangle?

A triangle has 3 interior angles that sums up to 180°. 

Angle 1 = 20° ; Angle 2 = 30° ; Angle 3 = ?

180 - 30 - 20 = 130°

Given the angle measurements, the triangle is an OBTUSE TRIANGLE.

Obtuse triangle is defined as a triangle that has one obtuse angle and two acute angles.

Obtuse angle is an angle that is more than 90°. Acute angle is an angle that is less than 90°.