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3 years ago

Maths question!!! The angles in triangle ABC are given in degrees, prove that AB=AC

Mathematics

2 answers:

ra1l [238]3 years ago

8 0

Do 12x+20=40x-8 and solve for x

ra1l [238]3 years ago

5 0

First, find out the value of x to confirm if they are really true.

We know that all the interior angles of a triangle equal to 180 degrees.

4x+5x-8+3x+20=180
12x=180-12
12x=168
x=168/12
x=14

Put in these values of to find if AB=AC.

(4×14)(3×14+20)=(4×14)(5×14-8)

Solve for LHS first,

(4×14)(3×14+20) = 56×62

=3472

Solve for RHS next,

(4×14)(5×14-8) = 56×62

=3472

Since LHS=RHS, AB is also equal to AC.

Hope I helped :)

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2 years ago

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