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Nitella [24]
3 years ago
5

What is the measure of the secant DE?

Mathematics
1 answer:
ladessa [460]3 years ago
4 0
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
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