If an isosceles triangle has two exterior angles that each measure 110°, the measure of the third exterior angle is

A 70°

B 120°

C 140°

D 250°

In \triangle ABC, the interior angle at A is 51° and the exterior angle at B is 119°. The interior angle at C measures

A 51°

B 68°

C 90°

D 39°

The sum of the exterior angles of a convex polygon

A is always 180°

B is always 360°

C is always 720°

D depends on the number of sides

The area of \triangle ADE is

A half the area of \triangle ABC

B one third the area of \triangle ABC

C half the area of trapezoid DBCE

D one third the area of trapezoid DBCE

1. The diagonals of a rectangle

A are perpendicular to each other

B bisect each other

C bisect each other and are perpendicular to each other

D bisect the interior angles

Find the measure of the unknown angle in these diagrams.

Find the measure of the unknown angle in these diagrams.

Find the measure of the unknown angle in these diagrams.

Find the measure of the unknown angle in these diagrams.

Find the sum of the interior angles of a 14-sided polygon.

The sum of the interior angles of a polygon is 2340^o. How many sides does th polygon have?