erighhere
erighhere
21-05-2018
Mathematics
contestada
What is the measure of the secant DE?
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musiclover10045
musiclover10045
21-05-2018
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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