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1. 9 yds

2. √29 in

3. 3√5

4. √205

5. 6

6. √458

7. 8√5

8. 4

9. √170

Step-by-step explanation:

a²+b²=c²

1. 12²+x²=15²

144+x²=225

√x²=√81

x=9

2. 2²+5²=x²

4+25=x²

√29=√x²

√29 = x

3. 6²+x²=9²

36+x²=81

√x²=√45

x = 3√5

4. 14²+3²=x²

196+9=x²

√205=√x²

√205=x

5. 8²+x²=10²

64+x²=100

√x²=√36

x=6

6. 13²+17²=x²

169+289=x²

√458=√x²

√458=x

7. 16²+8²=x²

256+64=x²

√320=√x²

8√5=x

8. 1²+x²=4²

1+x²=16

√x²=√16

x=4

9. 7²+11²=x²

49+121=x²

√170=√x²

√170=x

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: