Unit-6:Geometry
(a) Basic Concepts of Geometry
(b) Polygons and its angles
(c) Types of quadrilaterals, parallelograms
(d) Triangles,some important theorems on area
(e) Circles
(f) Faces, Verices and edges, pythagorean triplets
Q1.
If two lines are intersecting at right angle, Then lines are known as __________ lines.
(a) Perpendicular (b) Parallel
(c) None
Solution.
(a) Perpendicular
Solution
Q2.
Find an angle which is 360 more than its supplement.
(a) 980 (b) 1300 (c) 1080
(d) 1200
Solution.
let both angles are x and y
x + y = 180
x - y = 36
(c) 1080
Solution
Q3.
Can 12,5 and 13 be length of the sides of a right triangle?
(a) yes (b) no (c) can't say
Solution.
(a) yes
Longest side (13)2 = 169
Shorter sides (12)2 + (5)2 = 144 + 25 = 169
Solution
Q4.
Point of concurrence of the median is known as.
(a) Ortho-center (b) Circum-center (c) in-center (d) Centroid
Solution.
(d) Centroid
Solution
Q5.
Which one is not a property of Rhombus.
(a) All sides of are equal
(b) Opposites angle are equal
(c) Diagonals bisect
the interior angle.
(d) Both diagonals are equal
Solution.
(d) Both diagonals are equal
Solution
Q6.
A polygon is called regular if
(a) Its sides are equal .
(b) Its angles are equal.
(c) Its sides and angles are equal.
(d) None of these
Solution.
(c) Its sides and angles are equal.
Solution
Q7.
In a polygon sum of interior angle and exterior angle at a vertex will be _____
(a) 1800 (b) 3600
(c) 2400 (d) 900
Solution.
(a) 1800
Solution
Q8.
n- sided polygon can be divided into ________ triangle.
(a) n (b) (n-2) (c) (n-1) (d) 2n
Solution.
(b) (n-2)
Solution
Q9.
A diagonal of parallelogram divides it into two equal area triangles.
(a) False (b) True (c) Can't say
Solution.
(b) True
Solution
Q10.
The opposite angles of a cyclic Quadrilateral are ___________.
(a) 1800 (b) 2400 (c) 600
(d) 900
Solution.
(a) 1800
Solution
