Internal angles IST

Determine internal angles of isosceles trapezium ABCD /a, c are the bases/ and if:

alpha:gamma = 1:3

Final Answer:

α =  45 °
β =  45 °
γ =  135 °
δ =  135 °

Step-by-step explanation:

α=β γ=δ α:γ = 1:3 . 3α=1γ α+β+γ+δ=360    α+α+γ+γ=360 2α+2γ=360  2 α+2 3 α=360  α+3 α=180  4α=180  α=4180=45  α=45=45
β=α=45=45
γ=3 α=3 45=135
δ=γ=135=135



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