EASY
Stage 1 & 2
IMPORTANT
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The length of two sides of a triangle are 15 cm and 21 cm, then the third side will be 

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Important Questions on Triangles

EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 9
In a △ABC, D, E and F are the mid-points of sides AB, BC and CA respectively. The area of △DEF is 24 cm2, then area of △ABC is 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 10
If the sides of a triangle are in 4:6:7 ratio, then the triangle is 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 11
In a right angled triangle ABC, AD is perpendicular to the hypotenuse BC, then AB2 is equal to 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 12
If G is the centroid of ABC and the median AD is 21 cm, then the value of DG is 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 13
ABC is an equilateral triangle. If straight line perpendicular to AB, BC and CA thought the points B, C and A, respectively from a △PQR, then the ratio of △PQR and △ABC is 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 14
ABC is a triangle in which AB=AC. The base BC is produced to D and ∠ACD=130°, then ∠A is equal to 
MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 15
The medians of a right angled triangle which are drawn from the vertices of acute angles are 6 cm and 8 cm, then the length of the hypotenuse is 
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 9 - Triangles>Target Exercise>Q 16
In △ABC, AB=6 cm and DE∥BC, such that AE=14AC, then AD is equal to