Advertisements
Advertisements
Question
Calculate the unknown marked angles of the following figure :
Solution
We know that the sum of three angles of a triangle is 180°, therefore
In figure,
a + 90° + 40° = 180°
⇒ a + 130° = 180°
⇒ a = 180° − 130° = 50°
Hence a = 50°
APPEARS IN
RELATED QUESTIONS
The angles of a triangle are arranged in ascending order of magnitude. If the difference
between two consecutive angles is 10°, find the three angles.
Is the following statement true and false :
All the angles of a triangle can be greater than 60°.
Fill in the blank to make the following statement true:
An exterior angle of a triangle is always ......... than either of the interior opposite angles.
An exterior angle of a triangle is 108° and its interior opposite angles are in the ratio 4 : 5. The angles of the triangle are
In ΔPQR, If ∠R > ∠Q then ______.
Classify the following triangle according to sides:
The exterior angle of a triangle is equal to the sum of two
The angles of the triangle are 3x – 40, x + 20 and 2x – 10 then the value of x is
Q is a point on the side SR of a ∆PSR such that PQ = PR. Prove that PS > PQ.
In figure, PQ ⊥ RQ, PQ = 5 cm and QR = 5 cm. Then ∆PQR is ______.
