Angle Sum Property Questions

Find the third angle of a triangle if the other two angles are 45° and 75°.

A triangle has angles in the ratio 2:3:4. Find the measure of each angle.

One of the angles of a right-angled triangle is 35°. Find the other two angles.

The measure of one angle of a triangle is 50°, and the other two angles are equal. Find the measure of the equal angles.

In an isosceles triangle, the base angles are equal, and the vertex angle is 40°. Find the base angles.

Can a triangle have angles measuring 90°, 60°, and 40°? Why or why not?

If the exterior angle of a triangle is 110° and one of the opposite interior angles is 40°, find the other opposite interior angle.

Find the fourth angle of a quadrilateral if three angles are 80°, 90°, and 70°.

The angles of a quadrilateral are in the ratio 1:2:3:4. Find the measure of each angle.

The opposite angles of a quadrilateral are equal. If one of the angles is 85°, find the other three angles.