(1)Measure of one of the angles of a parallelogram is 70˚. What is the measure of its adjacent angle?
(2) What is the measure of each of the angle of a rectangle?
(3) How many sides does a regular polygon have, if each of its exterior angle is 20˚?
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state the numerical coefficent and degree of each expression, if it is a monomial (i) 45
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1) Let us consider one of the adjacent angle as x°
Other adjacent angle = 70°
We know that sum of adjacent angles = 180°
So, x° + 70° = 180°
x° = 180° – 70°
= 110°
2) Measures of the remaining angles are 70°, 70°, 110° and 110°.
3) Each exterior angle of a regular polygon = 20°.
So the polygon has 360/20 = 18 sides.
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