দুটি পরস্পরছেদী সরলরেখার একজোড়া বিপ্রতীপ কোণ পরস্পর পূরক কোণ হলে, অপর জোড়া বিপ্রতীপ কোণ দুটির প্রত্যেকটির মান হবে (a) 180° (b) 450 (c) 90° (d) 1359
Answers
Given : one pair of opposite angles of two intersecting straight lines complement each other,
To Find : the value of each of the other pair of opposite angles
(a) 180 ° (b) 450 (c) 90 ° (d) 135°
Solution:
opposite angles of two intersecting straight lines are Equal
Let say one pair opposite angles = a
and other pair opposite angles = b
one pair of opposite angles of two intersecting straight lines complement each other,
Complementary angles adds upto 90°
=> a + a = 90°
=> 2a = 90°
=> a = 45°
a + b = 180° as they form linear pair
=> 45° + b = 180°
=> b = 135°
the value of each of the other pair of opposite angles is 135°
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Answer:
135 is correct answer is math is very easy