Question

Which set of angles shows an acute triangle?

twenty degrees, sixty degrees, one hundred degrees

fifteen degrees, one hundred fifty degrees, fifteen degrees

thirty-five degrees, ninety degrees, fifty-five degrees

fifty degrees, sixty degrees, seventy degrees

Answer 1

Acute triangles have 3 acute angles.

Answer 2

Im Lost even more what?

Answer 3

Acute means less than 90 , right?

Answer 4

Let us take an angle, which is acute : \(\theta\)

Then : \(0 < \theta < 90 \)

Can you tell me now that what is the sum of all the angles of a triangle?

Answer 5

No?

Answer 6

Im stuiped?

Answer 7

An acute angle is less than 90 degrees. An acute triangle has three acute angles. Which answer has three acute angles?

Answer 8

Note this formula :

Sum of all angles of a polygon = (n-2) * 180

where n = number of sides

Here, in a triangle there are three sides, so n = 3

Put this in the formula :

Sum of all angles of a polygon ( here , it is triangle) = (3-2) * 180 degrees

Answer 9

What do you get?

Answer 10

Oh The last One!

Answer 11

Bingo.

Answer 12

Thank You!

Answer 13

Kitty, concentrate on mertsj answer. Please answer his question.

Answer 14

Do what?

Answer 15

Good. That's right.

Also , \(\huge{\color{blue}{\mathsf{Welcome }} \space \color{orange}{\mathsf{To}} \space \color{gold}{\mathsf{OpenStudy!!!}}} \)

Answer 16

Do nothing now :)

Answer 17

Haha No I still do it its just when Im stuck I need help
But thank you