zatolentino
18.05.2021 •
Mathematics
Cindy compro 7/8 yarda de cinta en la tienda de artesanías . Jacob compro 4/5 la longitud de la cinta como Cindy ¿ cuantas tardas de cinta compro Jacob ?
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Ответ:
So, angle DBC = angle DCB.
180° - 100° =80°
80÷2=40.
Angle C = 40°
Angle ABD is half angle DBC, so <ABD = 40°÷2=20°
Therefore, angle ABC=20°+40°=60°
To get the angle A, use the angles in a triangle ABC.
180° - (60°+40°)=80°
Angle A = 80°