BD score ∠ ABC, be score ∠ ABC is 2:5, DBE = 21 degrees, calculate the degree of ∠ ABC
Suppose be is divided into ∠ ABC as 2:5, and each small part of the two parts is x, then ∠ DBE = 3.5x-2x = 1.5x = 21 °, so x = 14 °, so ∠ ABC = 14 * 7 = 98 °
RELATED INFORMATIONS
- 1. As shown in the figure, BD is divided into two parts, be is divided into ABC 2:5, DBE = 21 ° and the degree of ABC is calculated
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