Question

find the area of a right angled triangle abc whose angle b=90 degree angle c=45 degree ac 6 cm​

Answer 1

Answer:

Step-by-step explanation:

∠ a+ ∠ b+ ∠ c=180°          [A.S.P.T]

∠ a +90°+45°=180°

∠a+135°=180°

∠ a = 180°-135°

∠ a =45°

as angle a=angle c

AB=BC

So,

AB²+BC²=AC²

x²+x²=6²

2x²=36

x²=36/2

x²=18

x=√18

x=4.24

therefore

area of a triangle= 1/2*base*height

                            =1/2*4.24*4.24

                             =8.98 cm²

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