A-a-angle!

Geometry Level 1

Angle B A C BAC is a right angle.

Can you find the measure of angle A B C ABC ?

20° 30° 50° 40° 10°

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Rosta Plachý by Rosta Plachý , 22, Czech Republic

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1 solution

Rosta Plachý
May 20, 2015

Here is the image :)

5 Helpful 1 Interesting 1 Brilliant 0 Confused

Hey, nice picture.. thank you

Jan Novotný - 6 years ago

how to know 110,70 ?

Ahmed Abuamra - 5 years, 12 months ago

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hey, because in triangle all angles make the sum 180° . So for example you have triangle ABC, where the alpha is 60°, beta is 40° and gamma is 80°, so the sum is 180°.

And If we know, that the triangle is right ( right triangle ). Then the one angle is 90° and next angle we can see and it is 20°, so 90°+20°=110° and 180°-110°=70° and here it is! :)

Can you understand me?

Rosta Plachý - 5 years, 12 months ago

Very nice solution

Sonal Singh - 5 years, 9 months ago

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Thank u so much! :)

Rosta Plachý - 5 years, 9 months ago

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