Question

50 POINTS
Calculate m∠DBE ? and m∠ABF, what is the value of x?

Answer 1

Whole plane consists of 360°

$\\ \sf\longmapsto x+5+x+45+90+3x+6=360$

$\\ \sf\longmapsto 5x+146=360$

$\\ \sf\longmapsto 5x=360-146$

$\\ \sf\longmapsto 5x=214$

$\\ \sf\longmapsto x=214/5$

$\\ \sf\longmapsto x\approx 43$

• m<DBE=3(43)+6=135
• m<ABF=90°

Somehow error present in diagram.(90° sign must not be x)