dzhferigausiajjjjjjjjjsifhhhhhhhhhhhhhhhhhhhhhhhhhhvnc saw
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Step-by-step explanation:
by angle sum pro
angle1+ angle 2+angle 3=180 degree
90+x+x=180 degree
90+2x=180 degree
2x=180÷90
2x=90
x=90÷2
x=45
ans is 45
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