For 5)
The angles inside a triangle adds up to 180 degrees.
A triangle that has an angle at 90 degrees is a right triangle
A triangle that has an angle greater than 90 degrees is an obtuse triangle
A triangle that has 3 different angles is an scalene triangle.
a) subtract 25 and 65 from 180 is 90- this is a right triangle
b) notice an angle 109 is greater than 90, this is an obtuse triangle
c) subtract 58 and 32 from 180 is 90- this is a right triangle
d) subtract 61 and 63 from 180 is 56, all angles are different - this is a scalene triangle
