GUATEMALA CITY - Torrential rains brought by the first tropical storm of the 2010 season pounded Central America and southern Mexico, triggering deadly landslides. The death toll stood at 15 Sunday but authorities said the number could rise.
Archimedes proved the formula for the area of a circle (A = Ï r 2, where r is the radius of the circle) and showed that the value of Ï lay between 3 + 1/7 (approximately 3.1429) and 3 + 10/71 (approximately 3.1408).
Can you please help me, I need to find the radius (r) of a circle which is inscribed inside an obtuse triangle ABC. (the circle touches all three sides of the triangle) I need to find r - the radius - which is starts on BC and goes up - up course the the radius creates two right angles on both sides of r. Hi Maria. Draw the radii to each of the three points of tangency and connect the vertices of the triangle to the center of the circle. Do you see that you have three pairs of congruent triangles? They are congruent because they are right triangles whose hypotenuses is shared and they have the same length of a leg (the radius).