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terrell31
13.12.2020 •
Mathematics
Prove that the measure of angle JKL is 90 degrees.
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Ответ:
∡ NKM + ∡KNM + ∡ NMK = 180° Because Angles in a triangle ΔNKM sum to 180°
∡ NKM + 90° + 60° = 180°
∡ NKM = 30°
∡ NKM = ∡JKN = ∡ MKL = 30° because ΔJKM∼ΔNKM∼ΔMKL
Finally:
∡ JKL = ∡ NKM + ∡JKN + ∡ MKL
∡ JKL = 30° + 30° + 30°
∡ JKL = 90°
Ответ:
Divide the numerator by the denominator.
Write down the whole number answer.
Then write down any remainder above the denominator.
Step-by-step explanation: