In the following, find the marked unknown angle: - Vidyadip

Question

In the following, find the marked unknown angle:

✓

Answer

Since, sum of all angles of triangle = 180°
Hence, 60° + 45° + 20° + x = 180°
⇒ 125° + x = 180°
⇒ x = 180° – 125°
⇒ x = 55°

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[4 marks sum]" from Triangles (Including Types, Properties and Constructions)→Triangles (Including Types, Properties and Constructions) — all question types→MATHS STD 6 question papers→ICSE Board STD 6 question papers→ICSE Board question paper generator→

Similar questions

A drum of kerosene is $\frac{3}{4}$ full. When 30 litres of kerosene is drawn from it, it remains $\frac{7}{12}$ full.
1. The capacity of the drum is :
(a) $120 l$$\quad$(b) $150 l$$\quad$(c) $180 l$$\quad$(d) $168 l$
2. The quantity of kerosene in the drum is:
(a) $135 l$$\quad$(b) $115 l$$\quad$(c) $125 l$$\quad$(d) $108 l$
3. If $15 l$ of kerosene is added to the drum, what fraction of the capacity would be filled?
(a) $\frac{1}{2}$$\quad$(b) $\frac{2}{3}$$\quad$(c) $\frac{5}{6}$$\quad$(d) $\frac{5}{12}$
4. If $35 l$ of kerosene is drawn from the drum, what fraction of the capacity would be filled?
(a) $\frac{5}{9}$$\quad$(b) $\frac{7}{9}$$\quad$(c) $\frac{11}{18}$$\quad$(d) $\frac{13}{18}$

Ratio of the distance of the school from A’s home to the distance of the school from B’s home is 2 : 1.
(i) Who lives nearer to the school?
(ii) Complete the following table:

A number is increased by 12 and the new number obtained is multiplied by 5. If the resulting number is 95, find the original number.

Simplify : $3 \frac{7}{8}-\left\{1 \frac{3}{8} \div\left(2 \frac{4}{5}-1 \frac{7}{10}\right)\right\}$

The measures of two complementary angles are (2x – 7)° and (x + 4)°. Find x.

Simplify : $2 \frac{2}{7}$ of $15 \frac{3}{4} \times 2 \frac{1}{4} \div \frac{4}{7}$ of $2 \frac{5}{8}$

Find the L.C.M. of the following, use common division method : 8, 10, 12, 16

Simplify : $3 \div\left[3 \times\left\{3-\left(3-\frac{1}{4}\right)\right\}\right]$

By weight, $90\%$ of tomato and $78\%$ of potato is water. Find the weight of water in $25\ kg$ of tomato.

Solve : $5 \frac{2}{3}- z =2 \frac{1}{2}$