The smallest angle of a right triangle is 20 degree angle. What is the measure of the
medium angle?

80

Step-by-step explanation:

Triangles equal 180 degree angle. 20 minus 180 is 160. 160 divides by 2 is 80. There are three sides to a triangle.

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2