Which is illegal as per law?

In a regular polygon, the ratio of the exterior angle to the interior angle is 4:5. Find the interior angle of the polygon.

If O is the orthocentre of ΔABC , if ∠ BOC = 135⁰ then what is the measure of  ∠ BAC?

If y = 5x + c passes through point A(5, 2), what is the value of c?

Find the area of triangle having sides 8 m, 9 m, and 13 m.

ABC is a triangle. AB = 5 cm, AC = √41 cm and BC = 8 cm. AD is perpendicular to BC. What is the area (in cm²) of triangle ABD?

The perimeter of a rectangle is 60 meters. If the length of the rectangle is twice the width, find the area of the rectangle.

What will be inradius of a right angle triangle whose base is 15cm & height is 8cm ?

PQ and PR are the two chords of a circle. The tangents at Q and R meet at A. If ∠QPR = 64°, then the measure of ∠QAR is?

Find the area of triangle having sides in the ratio 2:4:5 & the perimeter of the triangle is 22 cm