find the value of x
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Answered by
2
Step-by-step explanation:
The angles of triangle are=(x+21)°,x°,(2x-45)°
as we know
according to formula,
(x+21)+x+(2x-45)=180
=>x+21+x+2x-45=180
=>4x+(-24)=180
=>4x-24=180
=>4x=180+24
=>4x=204
=>x=204/4=51
=>x+21=51+21=72
=>2x-45=2×51-45
=102-45=57°
hence the angles are 72°,51°,57°
Answered by
1
Answer:
x+21°+x+2x-45=180°(angle sum property)
4x-24=180°
4x = 180+24
4x=204
x=204/4
x=51
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