CBSE Class 7 Mathematics Triangles and Its Properties Assignment Set 04

Question. Each acute angle of a right angled isosceles triangle is
(a) \(60^\circ\)
(b) \(30^\circ\)
(c) \(45^\circ\)
(d) \(50^\circ\)
Answer: (c) \(45^\circ\)

Question. The sum of all angles of a quadrilateral is
(a) \(180^\circ\)
(b) \(360^\circ\)
(c) \(90^\circ\)
(d) \(330^\circ\)
Answer: (b) \(360^\circ\)

Question. A triangle can have two
(a) Acute angles
(b) right angles
(c) Straight angles
(d) obtuse angles.
Answer: (a) Acute angles

Question. The number of medians in a \(\Delta\) is/are
(a) 1
(b) 2
(c) 3
(d) 4
Answer: (c) 3

Question. If two angles of a \(\Delta\) are \(30^\circ, 120^\circ\) then such a \(\Delta\) is
(a) Isosceles
(b) Scalene
(c) Equilateral
(d) Right
Answer: (b) Scalene

Question. Sum of all angles of a \(\Delta\) is
(a) \(180^\circ\)
(b) \(360^\circ\)
(c) \(270^\circ\)
(d) \(90^\circ\)
Answer: (a) \(180^\circ\)

Question. A \(\Delta\) can be constructed with sides in Cm are
(a) 2, 4, 8
(b) 4, 4, 8
(c) 3, 6, 9
(d) 7, 8, 9
Answer: (d) 7, 8, 9

Question. In a right angled \(\Delta ABC\) if \(AB^2 = AC^2 + BC^2\) then the right angle is
(a) \(\angle BCA\)
(b) \(\angle ABC\)
(c) \(\angle BAC\)
(d) \(\angle CBA\)
Answer: (a) \(\angle BCA\)

Question. Out of the following triplets, which triplet does not make a right angle \(\Delta\).
(a) 3, 4, 5
(b) 8, 15, 17
(c) 7, 24, 25
(d) 5, 6, 7
Answer: (d) 5, 6, 7

Question. In a right angled \(\Delta\) two sides are \(9\text{ cm}\) and \(12\text{ cm}\). The hypotenuse will be
(a) \(15\text{ cm}\)
(b) \(10\text{ cm}\)
(c) \(13\text{ cm}\)
(d) \(14\text{ cm}\)
Answer: (a) \(15\text{ cm}\)