Lil asked in Science & MathematicsMathematics · 2 months ago

The legs of an isosceles triangle are each 45 cm long.The measures of the base angles are each 70°. What is the measure of the third side?

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  • 2 months ago
    Favorite Answer

    apply the law of sine

    ..a................b

    ---------=--------------

    .sin(A)........sin(B)

    ..45..............b

    --------- = -----------

    .sin(70) ....sin(40)

    45sin(40) = bsin(70)

    b = 30.78 cm or 31 cm answer//

  • ted s
    Lv 7
    2 months ago

    comment : cos 70° = [ (1/2) of 3rd side ] / 45

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