Which of the following alphabets has atleast two lines of symmetry?
A(i) and (ii)
B(i) and (iv)
C(ii) and (iii)
D(iii) and (iv)
Which of the following options is TRUE?
A Square of any odd number can be expressed as the sum of two consecutive positive integers.
B Square of any natural number can be expressed as the sum of successive odd numbers starting from 1.
C For any natural number m > 1, 2m, m2 – 1 and m2 + 1 form pythagorean triplets.
D All of these
Fill in the blanks.
(i) Sum of interior angles of a polygon of n __P__ sides is right angles.
(ii) The measure of at least one __Q__ angle of a concave quadrilateral is more than 180°.
(iii) A quadrilateral which has only one pair of equal opposite angles is __R__.
(iv) Sum of all exterior angles of a polygon of n sides is __S__.
|A||4||exterior||kite||n × 360°|
|B||n – 2||exterior||trapezium||n × 180°|
|C||2n – 4||interior||trapezium||360°|
Please explain me the (i) question and how it's answer obtained