Advertisements
Advertisements
Question
In the following, find the marked unknown angle:
Solution
Since, sum of all angles of triangle = 180°
Hence, 60° + 45° + 20° + x = 180°
⇒ 125° + x = 180°
⇒ x = 180° – 125°
⇒ x = 55°
APPEARS IN
RELATED QUESTIONS
If the angles of a triangle are in the ratio 1: 2 : 3, determine three angles.
Two angles of a triangle are equal and the third angle is greater than each of those angles
by 30°. Determine all the angles of the triangle.
Find the value of the angle in the given figure:
One angle of a triangle is 60°. The other two angles are in the ratio of 5: 7. Find the two angles.
In the following, find the marked unknown angle:
Classify the following triangle according to angle:
The exterior angle of a triangle is equal to the sum of two
The correct statement out of the following is 
In figure, PQ ⊥ RQ, PQ = 5 cm and QR = 5 cm. Then ∆PQR is ______.
What is common in the following figure?
 |
 |
| (i) | (ii) |
Is figure (i) that of triangle? if not, why?
