Question

Which triangle is an obtuse triangle?

A
a triangle with angles that measure 35°, 65°, and 80°
B
a triangle with angles that measure 30°, 40°, and 110°
a triangle with angles that measure 60°, 60°, and 60°
C
a triangle with angles that measure 30°, 60°, and 90°

Answer 1

B. a triangle with angles that measure 30°, 40°, and 110°

Explanation:

An obtuse-angled triangle is a triangle in which one of the interior angles measures more than 90° degrees. In an obtuse triangle, if one angle measures more than 90°, then the sum of the remaining two angles is less than 90°.

Answer 2

None is obtuse

Explanation:

An obtuse is something more than 180°and less than 360°

A.35°+65°+80°=180° Not obtuse

B.30°+40°+110°=180° Not obtuse

60°+60°+60°=180° Not obtuse

C.30°+60°+90°=180° Not obtuse