5-9.

Mathematics
Tutor: None Selected Time limit: 1 Day

Apr 23rd, 2015

5 : - 

8^2 = 11^2 + r^2

r^2 = 8^2 - 11^2

r^2 = 64 - 121

r^2 = - 57

r = √ -57

6 : - 

RT^2 = 20^2 + 5^2

RT^2 = 400 + 25

RT = √425

RT = √ 25 * 17

RT = 5√17

7 : - 

13^2 = 4^2 + 12^2

169 = 16 + 144

169 = 160 which is not true

So ST is not a tangent.

8 : - 

FG and FA

Apr 23rd, 2015

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Apr 23rd, 2015
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