artemsandulyak563 artemsandulyak563

21-04-2022
Mathematics

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Triangle ABC is a right triangle, and mC is 78°.

What is mA?
A. 2°
B. 12°
C. 22°
D. 32°

Triangle ABC is a right triangle and mC is 78 What is mA A 2 B 12 C 22 D 32 class=

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xKavinsky xKavinsky

21-04-2022

Answer:

[B] 12°

Step-by-step explanation:

Given:

Triangle ABC is a right triangle, and m∠ C is 78°.

Solution:

Knowing that Triangle = 180 degree

Square in a right angle = 90° angle.

Thus,

78+90 =168

180-168 is 12

Hence, the answer is [B] 12 degree

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