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

∠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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