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2 years ago

Pls help this is my last problem and I need to pass this class?!?

Mathematics

2 answers:

densk [106]2 years ago

8 0

Answer:

A = 50°

Step-by-step explanation:

$(2x - 10) + (x + 30) + 70 = 180 \\ 2x + x = 180 + 10 - 30 - 70 \\ 3x = 90 \\ x = \frac{90}{3} \\ x = 30$

Then

$a = 2x - 10 \\ a = 2(30) - 10 \\ a = 60 - 10 \\ a = 50$

Karolina [17]2 years ago

8 0

$\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}$

Actually Welcome to the Concept of the Triangles.

Since we know that, the Angle sum property of a triangle is equal to 180°.

means that, <A + <B + <C = 180°

so we can write as,

==> 2x-10 + x + 30 +70 = 180°

===>3x +90 = 180

==> 3x = 90

hence, x = 30°

so now, substitute angle x,

So angle A is => 2(30)-10 => 60-10 = 50°

hence Angle A = 50°.

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