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)