Question

Construct triangle LMN if LN= 4cm, angle MLN=39 degrees and angle MNL=80 degrees what type of triangle does this construct

Answer 1

D. acute

Explanation:

We know two of the three angles of Triangle LMN, which are 80 and 39.

A triangle's angles sum up the 180 degrees.

Therefore, the third angle is 180 - 80 - 39 = 61 degrees.

Recall the definition of obtuse (one angle greater than 90 degrees), right (one angle is 90 degrees), equiangular (all angles are equal), and acute (all angles are less than 90 degrees) triangles.

We can see that 80, 39, and 61 are all less than 90 degrees. Hence, the answer is D. acute.

Hope this helps!

༺ℝ