evelynontiveros2016
27.07.2021 •
Mathematics
Cho tam giác nhọn abc có các đường cao ad,be, cf cắt nhua tại H gọi o là trung điểm của bc, i là trung điểm ah, k là giao điểm của ef và oi biết bc=2a. chứng minh các tam giác ieo, ifo là tam giác vuông
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Ответ:
4x + 40+6x + 20 = 180 alternate interior angles
4x+6x+40+20 = 180
10x+60 = 180
10x = 180-60
10x = 120
x = 120/10
x = 12
Angle 1 = 4(12)+40
Angle 1 = 48+40
Angle 1 = 88 degrees
Angle 2 = 6(12)+20
Angle 2 = 72+20
Angle 2 = 92 degrees
Hope this helps you.