Question

Given ΔABC, with m∠A = 55° and m∠B = 70°, which of the following descriptions of the triangle are true?

I. acute
II. obtuse
III. right
IV. scalene
V. isosceles

Answer 1

all angles in a triangle add up to 180
given 2 of the angles 55 and 70 you can find the 3rd
a right triangle is one in which there is a 90 ° angle
in an isosceles triangle 2 of the angles are equal
an obtuse triangle has one angle more than 90°
now by elimination choose your answers