Question

Q19. A quadrilateral has three acute angles, each measure 80. what is the measure of the
fourth angle?​

Answer 1

Step-by-step explanation:

sum of all angles in a quadrilateral is 360 degrees.

if each angle measures 80° then three angles measures to 240 degrees.

therefore the fourth angle is 360 - 240= 120 degrees.

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Answer 2

Given :

• A quadrilateral has three acute angles, each measure 80.

To find :

• The measure of the fourth angle =?

Step-by-step explanation :

As We know that :

Sum of all angles of quadrilateral = 360°

It is Given that :

A quadrilateral has three acute angles, each measure 80.

So, all three angles of quadrilateral = 80° + 80° + 80° = 240°

Now,

Let, the fourth angle of the quadrilateral be, x.

According to the question,

240° + x = 360°

x = 360° - 240°

x = 120°

Therefore, Fourth angle of the quadrilateral = 120°.