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

Why does using a measure of body weight not tell us everything about how healthya person might be?
Unlike nonsteroid hormones, steroid hormones a. include proteins and modified amino acids. b. enter the nucleus and change gene expression in a target cell.
What is the definition of an extinct species? A. A species which no longer exists B. A species at risk of dying out C. A species who's population is increasi
How did Lucretia Mott's early life influence her achievements later in life
What is the similarities of Sparta and Athen structure?
According to qian long, why are european missionary activities restricted in china?
An object has a kinetic energy of 25 J and a mass of 35 kg, how fast is the object moving?
Explain why Coquina is classified as a biochemical Rock With A clastic texture
I need help on 27 pleaseeeeeeeee
Choose the correct answer. Your bill from Acme is marked "3/12, net 30." The amount of the bill is $98.65. If you pay the bill within 12 days, how much should