# 7th Class Mathematics Triangles Question Bank

### done Triangles

• A) A

B) B

C) C

D) Either A or B

• A) An acute angled triangle.

B) An obtuse angled triangle.

C) A right angled triangle.

D) An isosceles triangle.

• A) A scalene triangle.

B) An isosceles triangle.

C) An equilateral triangle.

D) No triangle is formed.

• A) ${{30}^{o}}$

B) ${{45}^{o}}$

C) ${{60}^{o}}$

D) ${{90}^{o}}$

• A) An isosceles triangle.

B) An equilateral triangle.

C) A right angled triangle.

D) A right angled isosceles triangle.

• A) ${{50}^{o}}$

B) ${{100}^{o}}$

C) ${{130}^{o}}$

D) ${{180}^{o}}$

• A) A right angled triangle.

B) An isosceles triangle.

C) A right angled isosceles triangle.

D) No triangle is formed.

• A) The sum of two sides of a triangle is greater than the third side.

B) In a right angled triangle, hypotenuse is the longest side.

C) A, B and C are collinear if $AB+BC=AC$.

D) The sum of angles in a triangle is less than ${{180}^{o}}$.

• A) $37cm$

B) $3.72\,cm$

C) $0.372\,cm$

D) $37\,m$

• A) 10 units

B) $5\sqrt{2}$ units

C) $10\sqrt{2}$ units

D) 15 units

• A) ${{72}^{o}}$

B) ${{36}^{o}}$

C) ${{144}^{o}}$

D) ${{108}^{o}}$

• A) $3\,\,cm$

B) $8\,\,cm,$

C) $3\,\,cm$ or $8\,\,cm,$

D) Neither [a] nor [b]

• A) An isosceles triangle.

B) A right angled triangle.

C) An isosceles right angled triangle.

D) An equilateral triangle.

• A) $19\,cm$

B) $17\,cm$

C) $38\,cm$

D) $30\,cm$

• A) Acute angles

B) Obtuse angles

C) Right angles

D) Reflex angles

• A) ${{60}^{o}}$

B) ${{45}^{o}}$

C) ${{90}^{o}}$

D) ${{135}^{o}}$

• A) $a-b>c$

B) $c>a+b$

C) $c=a+b$

D) $b<c+a$

• A) An acute angled triangle.

B) An obtuse angled triangle.

C) A right angled triangle.

D) A right angled isosceles triangle.

• A) exactly one acute angle,

B) exactly two acute angles.

C) at least two acute angles.

D) exactly 2 right angles.

• A) $3$

B) $4$

C) $2$

D) $5$

• A) AB

B) BC

C) AC

D) Either [a] or [b]

• A) P is true and Q is the correct explanation of P.

B) P is true and Q is not the correct explanation of P.

C) P is false.

D) P is the correct explanation of Q.

• A) Always false.

B) Always true.

C) Cannot be determined.

D) Sometimes false.

• A) The difference of any two sides is less than the third side.

B) A triangle cannot have two obtuse angles.

C) A triangle cannot have an obtuse angle and a right angle.

D) All the above.

• A) $5\,m$

B) $31\,m$

C) $13\,m$

D) $18\,m$

• A) $20\,m$

B) $25\,m$

C) $30\,m$

D) $17\,m$

• A) $1:2$

B) $1:3$

C) $2:1$

D) $3:1$

• A) Angle bisectors

B) Perpendicular bisectors

C) Altitudes

D) Medians

• A) The centroid of an acute angled triangle lies in the interior of the triangle.

B) The ortho centre of an acute angled triangle lies in the interior of the triangle.

C) The medians of a triangle are concurrent.

D) All the above.

• A) $4\,\,cm$

B) $6\,\,cm$

C) $2\,\,cm$

D) $8\,\,cm$

• A)  $1:2$

B)  $2:1$

C)  $3:1$

D) $1:3$

• A) The ortho centre of a right angled triangle is the vertex containing the right angle.

B) The median of a triangle joins a vertex to the midpoint of the opposite side.

C) The centroid of a right angled triangle lies in the interior of the triangle.

D) All the above.

• A) Median

B) Altitude

C) Centroid

D) Ortho centre

• A) Centroid

B) Median

C) Altitude

D) Vertex

• A) $XP=XY$

B) $YP=PZ$

C) $XP=XZ$

D) $XY=XZ$

• A) $\angle x+\angle y=\angle 1+\angle 3$

B) $\angle y=\angle 2$

C) $\angle x=\angle 1$

D) $\angle x+\angle y=\angle 1+\angle 2$

• A) ${{45}^{o}}$

B) ${{65}^{o}}$

C) ${{55}^{o}}$

D) ${{35}^{o}}$

• A) RQ

B) PQ

C) PR

D) Either [a] or [b]

• A) A triangle can have three 60? angles.

B) A triangle can have a right angle.

C) A triangle can have two right angles.

D) A triangle can have all three angles equal.

• A) ${{80}^{o}},{{60}^{o}}$

B) ${{60}^{o}},{{40}^{o}}$

C) ${{60}^{o}},{{80}^{o}}$

D) ${{40}^{o}},{{60}^{o}}$

• A) ${{30}^{o}}$

B) ${{40}^{o}}$

C) ${{20}^{o}}$

D) ${{10}^{o}}$

• A) ${{18}^{o}},{{70}^{o}}$ and ${{92}^{o}}$

B) ${{92}^{o}},\,{{70}^{o}}$ and ${{18}^{o}}$

C) ${{70}^{o}},{{92}^{o}}$ and ${{18}^{o}}$

D) ${{70}^{o}},{{18}^{o}}$ and ${{92}^{o}}$

• A) ${{110}^{o}}$

B) ${{35}^{o}}$

C) ${{140}^{o}}$

D) ${{155}^{o}}$

• A) XY

B) XZ

C) ZX

D) YZ

• A) The exterior angle of a triangle is equal to its interior adjacent angle.

B) The median of a triangle joins its vertex to the midpoint of its opposite side.

C) The altitude of a triangle is drawn from a vertex to the midpoint of the opposite side.

D) All the above.

• A) 0

B) 2

C) 3

D) 1

• A) ${{30}^{o}}$

B) ${{60}^{o}}$

C) ${{90}^{o}}$

D) ${{120}^{o}}$

• A) $x={{70}^{o}},y={{70}^{o}},z={{55}^{o}}$

B) $x={{70}^{o}},y={{55}^{o}},z={{55}^{o}}$

C) $x={{55}^{o}},y={{55}^{o}},z={{55}^{o}}$

D) $x={{70}^{o}},y={{55}^{o}},z={{70}^{o}}$

• A) $x={{47}^{o}},y={{25}^{o}}$

B) $x={{27}^{o}},y={{45}^{o}}$

C) $x={{45}^{o}},y={{27}^{o}}$

D) $x={{25}^{o}},y={{47}^{o}}$

• A) ${{106}^{o}}$

B) ${{53}^{o}}$

C) ${{26}^{o}}$

D) ${{52}^{o}}$

• A) ${{112}^{o}}$

B) ${{56}^{o}}$

C) ${{68}^{o}}$

D) ${{106}^{o}}$