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1. How many elements are there in a triangle?
A. 3
B. 6
C. 4
D. None of these.
2. How many vertices does a triangle have?
A. 1
B. 2
C. 3
D. 4
3. How many sides are there in a triangle?
A. 1
B. 2
C. 3
D. 4
4. How many angles are there in a triangle?
A. 1
B. 2
C. 3
D. 4
5. If two sides of a triangle are not equal, the triangle is called
A. scalene
B. isosceles
C. equilateral
D. right-angled
6. If two sides of a triangle are equal, the triangle is called
A. isosceles
B. equilateral
C. scalene
D. right-angled
7. If all the angles of a triangle are acute, the triangle is called
A. obtuse-angled
B. acute-angled
C. right-angled
D. none of these
8. If one angle of a triangle measures 90°, the triangle is called
A. acute-angled
B. obtuse-angled
C. right-angled
D. none of these
9. How many medians can a triangle have?
A. 1
B. 2
C. 3
D. 4
10. How many altitudes can a triangle have?
A. 1
B. 2
C. 3
D. 4
11. The total measure of the three angles of a triangle is
A. 360°
B. 90°
C. 180°
D. none of these
12. The measure of each angle of an equilateral triangle is
A. 30°
B. 45°
C. 90°
D. 60°
13. Which of the following statements is true?
A. A triangle can have two right angles
B. A triangle can have two obtuse angles
C. A triangle can have two acute angles
D. A triangle can have all the three angles less than 60°
14. Which of the following statements is true?
A. A triangle can have all the three angles equal to 60°.
B. A triangle can have all the three angles greater than 60°.
C. The sum of any two angles of a triangle is always greater than the third angle.
D. Both A & C
15. Which of the following statement is false?
A. The sum of the lengths of any two sides of a triangle is less than the third side.
B. In a right-angled triangle, the square on the hypotenuse = sum of the squares on the legs.
C. If the Pythagorean property holds, the triangle must be right-angled.
D. The diagonal of a rectangle produce ‘by itself the same area as produced by its length and breadth
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