Triangle KLM is isosceles with sides ML=240mm and MK=74mm calculate the size of angle MKL

Question

Triangle KLM is isosceles with sides ML=240mm and MK=74mm calculate the size of angle MKL

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Thanh Thu 4 years 2021-09-04T11:45:51+00:00 1 Answers 5 views 0

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  1. Thunguyet
    0
    2021-09-04T11:47:30+00:00
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    Answer:

    ∠MKL = 81.13°

    Step-by-step explanation:

    240 mm has to be the equal legs because two 74 mm legs wouldn’t work with a 240 mm base leg.

    Drop a line from m to be perpendicular to LK.

    This divides LK into two 37 mm segments.

    cos ∠MKL = 37/240

    cos ∠MKL = 0.1542

    ∠MKL = 81.13°

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