haileysolis5
26.02.2020 •
Mathematics
Select the correct answer.
Quadrilateral ABCD is inscribed in circle Pas shown. Which statement is necessarily true
A MLA-M2B=mcomD
B. MLA+ m2C= m_8-MLD
Cm2A-M_D = m2B-mcc
D. MLA-M2B = 2/m2C-mzD)
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Ответ:
a2=b2+c2
Step-by-step explanation: Let a =20, b=15, x, and c~AB.
20^2=15^2+c^2 .: 400=225+c^2 .: c^2=400-225 -> c^2=175 .: c=\/175.: c=5\/7.
Let be c^2=a.n, and a=20, n=20-x. So
175=20.(20-x) , 175=400-20.x, 225=20.x, 225/20=x, x=45/4 .: