22-08-2017
Mathematics

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Please answer these but do it step by step, thanks

Please answer these but do it step by step thanks class=

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Banabanana Banabanana

22-08-2017

m∠ADB + m∠BDC = m∠ADC
x + x + 10 = 60
2x + 10 = 60
2x = 60 - 10
2x = 50
x = 50/2
x = 25

a
m∠ADB = x = 25°

b
m∠BDC = x + 10 = 25 + 10 = 35°

с
Angle Addition Postulate

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