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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Geometry
2.25 Pythagorean Theorem - Examples

Theorem: In a right angled triangle, the square on the hypotenuse is equal to the sum of the squares of the other two sides.
If the length of the hypotnuse is c and the lengths of other two sides are b and a then according to the pythogorean theorem:
c2 = a2 + b2


Converse: In a triangle if the square of one side is equal to the squares on the sums of the other two sides, then the angle opposite to the first side is a right angle.
To prove: AB2 + BC2 = AC2

Example: Prove that the sum of the squares of the sides of a rhombus is equal to the sum of the squares of the diagonals.


Directions: Solve the following problems. Also write at least 10 examples of your own.
Q 1: The sides of a triangle are 50cm, 80cm, 100cm, check if this is a right angled triangle.
no
yes

Q 2: A ladder is placed in such a way such that its distance from the wall to the foot of the ladder is 5 cm, its top reaches a height of 12m from the ground. Find the length of the ladder.
15m
12m
13m

Q 3: The sides of a triangle are 3cm, 8cm, 6cm, check if this is a right angled triangle.
yes
no

Q 4: Two poles 6m and 11m stand on a plane ground. If the distance between their feet is 12m, determine the distance between their tops.
11 m
13 m
12 m

Q 5: Triangle PQR is equilateral. QR = 30 units, B is the midpoint of QA. QA is perpendicular to PR. What is the length of PB?
23 cm
24 cm
19.84 cm

Q 6: The sides of a triangle are 7cm, 24cm, 25cm, check if this is a right angled triangle.
no
yes

Q 7: Which of these is a Pythagorean triplet?
15, 8, 5
8, 9, 13
13, 12, 5

Q 8: A person goes 10 m due east and then 30m due north. Find his distance from the starting point.
10m
15m
12m

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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