2 years ago

Rhombus ABCD has a diagonal BD¯¯¯¯¯.

Mathematics

1 answer:

ELEN [110]2 years ago

5 0

Answer:

Solution given:

m∠ADB=(4x−12)°

m∠CDB=(3x+6)°

m∠ADC =?

Since diagonal BD bisect the angle <ADC

m∠ADB= m∠ADC

(4x-12)°=(3x+6)°

4x-3x=6-12

x=12+6

x=18°

again.

<ADB=m∠ADB+ m∠ADC=4×18-12+3×18+6=120°

the m∠ADC =120°

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