Angles in a triangle
Types of exercises: angles in an isosceles triangle, exterior angle of a triangle.
Exercises are drawn at random from a large bank - every click gives a different set.
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Solved: 0 of 10
Problem
In triangle ABC the interior angles at vertices B and C have equal measures, and the exterior angle at vertex A measures 130°. How many degrees is the interior angle at vertex B?
Problem
In triangle ABC the sides AC and BC are equal. The exterior angle at vertex A measures 127°. How many degrees is angle ACB?
Problem
The angles of triangle ABC at vertices B and C measure 72° and 38°. How many degrees is the exterior angle of this triangle at vertex A?
Problem
Triangle ABC is acute and its sides AC and BC are equal. The altitude AD is drawn (point D lies on side BC). Angle BAD measures 12°. How many degrees is angle ACB?
Problem
In triangle ABC the exterior angle at vertex B measures 107°, and the exterior angle at vertex C measures 107°. How many degrees is the interior angle at vertex A?
Problem
Each base angle of an isosceles triangle is 2 times the angle between the equal sides. How many degrees is each base angle?
Problem
In triangle ABC the exterior angle at vertex C measures 139°, and the interior angle at vertex B measures 92°. How many degrees is the interior angle at vertex A?
Problem
In triangle ABC the sides AC and BC are equal. The exterior angle at vertex C measures 66°. How many degrees is angle CAB?
Problem
The angles of triangle ABC at vertices C and A measure 59° and 20°. How many degrees is the exterior angle of this triangle at vertex B?
Problem
The angle between the equal sides of an isosceles triangle is 72° larger than each base angle. How many degrees is the angle between the equal sides?
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