Answer:
a=8
Step-by-step explanation:
We can use ratios of similar triangles to solve
The smaller triangle has sides a and 12 and the larger triangle has sides a+a+4 and 12+18 which combine to 2a+4 and 30
a 2a +4
--------- = -----------
12 30
Using cross products
30a = 12(2a+4)
30a = 24a +48
Subtract 24a from each side
30a -24a = 24a-24a +48
6a = 48
Divide each sdie by 6
6a/6 =48/6
a =8
Answer:
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36
Add all the sides up
15+15=30
3+3=6
30+6=36
Answer:
6300
Step-by-step explanation:
6261 to the nearest 100 -----261 would round up to 300 =6300
The answer would be 0.13658537...
but when you estimate it the answer would be 0.14