opposite angles

Summary - An acute angle has a measure less than 90 o . A Right angle has a measure of 90 o . An Obtuse angle has a measure greater than 90 o but less than 180 o . A Straight angle has a measure of 180 o . A reflex angle has a measure greater than 1..

A pair of angles are said to be alternate angles if (i) both are interior angles (ii) they are on the opposite sides of the transversal and (iii) they are not adjacent angles. Alternate angles are some times also called alternate interi..

Angle of Friction - Consider a block placed on a rough floor. Now, the reaction force is because it is equal and opposite to the weight . Now apply a horizontal force so that the block just begins to slide, i.e., the frictional force is equal to the limiting friction. When this ..

If the length of the leg opposite to the 60° angle in a 30° - 60° - 90° triangle is 7 3 cm, then the length of the hypotenuse is => 9 cm. or 6 cm. or 14 cm. or 3 3 cm...

The segment whose end points are a vertex of a triangle and the midpoint of the side opposite to the vertex is called => perpendicular bisector of side or altitude or angle bisector or median..

Interior and Exterior angles of a triangle - In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of t..

In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangle. Now observe the triangle in which the si..

Two adjacent angles are said to form a linear pair of angles, if their non-common arms are two opposite rays. Recall adjacent angles. Now observe the pairs of angles in the figure. ..

If two adjacent angles are supplementary, their exterior arms lie in a straight line. If two lines intersect, the vertically opposite angles so formed are equal. When a number of lines meet at a point, the sum of the angles so formed is 360 ..

To determine the angle of minimum deviation the side AB of the prism is made to face the ray of light. On looking through the face AC and rotating the prism table, the image of slit also turns. For a particular position of the prism, the slit becomes stationary. On further rotating the p..