Question

(8) Classify the triangle with angles measuring 113 degrees, 47 degrees, and 20 degrees. * Lesson 4 Acute Obtuse Right

Answer 1

An obtuse triangle has at least 1 angle that measures more than 90º.
An acute triangle has all angles that measure under 90º.
A right triangle has 1 angle that measures exactly 90º.

Since 113º > 90º rather than being less than (acute)  or equal to (right), a triangle with these angles is an obtuse triangle.

Answer:
Obtuse