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Check, if the following are Pythagorean triplets or not:

8, 15, 17

Important Questions on Square and Cube

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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
BD and CE are the medians of △ABC, right angles at A. If CE =5132 cm, BC =10 cm, then the length of BD is ____.
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties

In the figure, ∠ABC=90°, ∠C=∠D=45°, AB=10 cm. What is the length of AC?

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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties

In the figure, ∠ABC=90°, ∠C=∠D=45°, AB=10 cm. What is the radius of the circumcircle of triangle ABD?

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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
Triangles ABC and DBC are right-angled triangles with common hypotenuse BC, BD, and AC intersect at P when produced. If PA=8 cm, PC=4 cm and PD=3.2 cm, then the length of BD in cm is:
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
In ∆PQR measure of angle Q is 90o. If tan P=247 and PQ =14cm, then what is the length of side QR in cm.
EASY
Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
In triangle ABC, if ∠B=90°, AB=21 cm and BC=20 cm, then 1+sinA-cosA1+sinA+cosA is equal to:
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties

In the figure, ∠ABC=90°, ∠C=∠D=45°, AB=10 cm. What is the radius of the circumcircle of triangle ABC?

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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
ABC is a triangle right angled at B. Let D be the midpoint on AC. If BD=6.5 cm, then what is AB2+BC2 is equal to?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
In ∆ABC, ∠A=90°, M is the midpoint of BC and D is the point on BC such that AD⊥BC. If AB=7cm and AC=24cm, then AD:AM is equal to?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
In ΔABC, AB=c cm, AC=b cm and CB = a cm. If ∠A=2∠B , then which of the following is true?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
Point M and N are on the sides PQ and QR respectively of a triangle PQR, right angled at Q. If PN=9 cm, MR=7cm, and MN = 3 cm, then find the length of PR (in cm).
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
∆DEF is right angled at E. If m ∠F=30o, then find the value of cosD-12.
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
Let ABC be a triangle right-angled at C, then what is tanA+tanB equal to?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
What is the perimeter of a right-angled triangle whose sides (making 90°) are 203 cm and 153 cm?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
ABC is a triangle right angled at A and AD is perpendicular to BC. If BD=8 cm and DC=12.5 cm, then what is AD equal to?
EASY
Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
What is the least number that should be added to the product of 7×8×9×10 to make it a perfect square?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
Triangle ABC is right-angled at A and AD is perpendicular to BC. If BD =7.5 cm and DC =10 cm, then what is AD equal to?
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
State Pythagoras theorem.
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
For a Right angled triangle, two connected sides are 1.5 & 2 cm. Find the area of circumcircle? 
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Mathematics>Arithmetic>Square and Cube>Square Numbers and their Properties
In △ABC, the measure of angle ∠ABC is 90°. If tanA=125, and AB=1 cm, then what is the length (in cm) of side BC?