taskmasters
taskmasters taskmasters
  • 11-09-2016
  • Mathematics
contestada

If m∠ABC = 72°, what is m∠DAB?

A) 72°
B) 108°
C) 144°
D) 216°

If mABC 72 what is mDAB A 72 B 108 C 144 D 216 class=

Respuesta :

Аноним Аноним
  • 11-09-2016
∠ABC=∠CDA=72º
∠DAB=∠BCD=x

∠ABC+∠CDA+∠DAB+∠BCD=360º

Therefore:
72º+72º+x+x=360º
144º+2x=360º
2x=360º-144º
2x=216º
x=216º/2
x=108º

So, ∠DAB=∠BCD=x=108º

Answer: 
∠DAB=108º  (B)
Answer Link
9cakaolisa 9cakaolisa
  • 21-04-2020

B) 108°

Answer:

B) 108°

Step-by-step explanation:

Answer Link

Otras preguntas

What 6 factors are found in every type of economy?
Simplify the expression: sqrt(4x^2/3y)
x -ln(x) =0 solve for x
Billy Graham spoke out against the _____. social reforms of the 50s the evils of rock and roll the litigation in the South the evils of the Soviet Union
derivative of the (sqrt of t/4t-3)
the table shows the low temperature in five cities on a winter day. which statement is true A. it is warmer in Tacoma than in Roseville B. it is colder in Rosev
Read the paragraph. Long ago people made buildings by fitting boards together. Then they learned to shape metals. The invention of nails followed. Wh
BRAINLIESTTTT A plane can fly 11 miles per minute. The plane will fly 6 trips, and each trip is 500 miles. How many hours will the plane fly? Show your work to
Once integrity has been lost, it is impossible to regain. true or false
How long does Earth take to travel around the sun? 24 hours approximately 365 days one week three months