Step-by-step explanation:

( vertically opposite angles)



Answer:
2 x 2 x 5,
Step-by-step explanation:
20 = 1 x 20
2 x 10
4 x 5
Factors of 20= 1, 2, 4, 5, 10, 20.
Prime factors are = 2 x 2 x 5,
12 2 +16 2 = D2
D2= 144+256
D2= 400
D2= 400
1/10 = 0.1
0.9 x 0.1 = 0.09
0.09 is your answer
hope this helps