Write the ratio of corresponding sides for the similar triangles and reduce the ratio to lowest terms.
a 12 13 1
36 - 39 - 3
b. 12 36 12
13 39 13
c. 12 13 4
39 36 13
d. 39 36 13

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

this is false ^.^ lol

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.