Isosceles triangle

What are the angles of an isosceles triangle ABC if its base is long a=7 m and has an arm b=9 m?

Final Answer:

α =  45.7708 °
β =  67.1146 °
γ =  67.1146 °

Step-by-step explanation:

a=7 m b=9 m  sin 2α = ba/2 α = 2 arcsin ba/2  A=2 arcsin(2 ba)=2 arcsin(2 97)0.7989 rad α=A  °=A π180   °=0.7989 π180   °=45.771  °=45.7708=45°4615"
β=2180α=218045.7708=67.1146=67°653"
γ=β=67.1146=67.1146=67°653"



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You need to know the following knowledge to solve this word math problem:

planimetrybasic operations and conceptsgoniometry and trigonometryUnits of physical quantities

 
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