A) they fornite a right angle and 2 acute angles(not 100% sure of what the Questions is asking)
B) they appear to form a triangle
C) the angles add up to 180 as they always do in all triangles
B)
30+6+0.4+0.09+0.005=36.495
A integer for -4 would be +4
Look up the.name of the book online with anser sheet I had that same book just find the page
