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sosojake4974
15.07.2019 •
Mathematics
Maths ! the angles in triangle abc are given in degrees, prove that ab=ac
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Ответ:
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 :)
Ответ:
you just multiply