Download App

Triangles (Including Types, Properties and Constructions) — MATHS STD 6 — Question

ICSE BoardEnglish MediumSTD 6MATHSTriangles (Including Types, Properties and Constructions)3 Marks
Question
Find, giving a reason, the unknown marked angles, in a triangle drawn below:
✓

Answer

We know that,
Exterior angle of a triangle is always equal to the sum of its two interior opposite angles (property)
110° = 2x + 3x
5x – 110°
$x=\frac{110^{\circ}}{5}$
x = 22°
∴ 2x = 2 x 22 = 44°
3x = 3 x 22 = 66°

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 "[3 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

Simplify : $a -[-\{-(a-\overline{ b-c })\}]$
→
Convert the following decimal into a fraction with lowest term : 5.4
→
What must be subtracted from $9 \frac{1}{6}$ to get $6 \frac{1}{9}$ ?
→
Find the H.C.F. of the following number use long division method : 252, 576
→
The number 650 is decreased to 500 in the ratio a : b, find the ratio a : b.
→
15 boxes of the same size contain 1080 pens. How many such boxes will be needed for 1800 pens?
→
Write the degree of the following polynomial:
$3y^3 − 2y^2z^4$
→
Simplify : $\frac{4}{9}-\frac{5}{12}+\frac{1}{4}$
→
Solve the following equation: $3y \div 8 = 13$
→
Express the following as a product of prime factor : 2535
→