Answer:
a
Step-by-step explanation:
complementary angles sum to 90° , so
3x + 4 + 6x - 4 = 90
9x = 90 ( divide both sides by 9 )
x = 10
Using the formula (AB +BC) *BC = (DE +CD) *CD
fill i n what is known:
(17 + 4) *4 = (DE +6) *6
21*4 = (DE +6)*6
84 = (DE+6)*6
84/6 = DE+6
14 = DE +6
DE = 14-6
DE = 8
Answer:
3.
Step-by-step explanation:
The scale factor is basically what figure B is divided by.
9 / 3 = 3
3.6 / 3 = 1.2
Answer:
40 square units
Step-by-step explanation:
Its a Right triangle, so you can use either of the legs of the right angle as the base and the height interchangeably.
Flip it over in your mind Area of a triangle is Hald of the base times height.
10 ×8 = 80 Divide by 2
80/2 = 40 units²