Question

What type of triangle has side lengths of 4, 7, and 9?

A.
acute
B.
right
C.
obtuse
D.
The lengths do not form a triangle.

Answer 1

acute is your answer

Answer 2

obtuse

Explanation:

Obtuse Scalene Triangle

Side a = 9

Side b = 4

Side c = 7

Angle ∠A = 106.602° = 106°36'6" = 1.86055 rad

Angle ∠B = 25.209° = 25°12'32" = 0.43998 rad

Angle ∠C = 48.19° = 48°11'23" = 0.84107 rad

(I used triangle calculator on calculator. net)