For the first one. An equilateral triangle is one with three equal sides. An isosceles triangle is one with two equal sides. Therefore, every equilateral triangle is isosceles, but not every isosceles triangle is equilateral. So far, so book.
For the second one. Right triangles are defined as triangles that contain a right angle, where a right angle is an angle with a measure of 90°. Isosceles triangles are defined as triangles that have two sides of equal length.
This is the equation 185+185(2)+185-50 185+370+185-50 (you multiply 185 times 2 first) 370+370-50 (you add 185 to 185) 740-50 (you add 370 to 370) 740-50=690 There were 690 visitors during these three days.
