An isosceles triangle is a triangle that has two congruent or equal sides. For example, a triangle that has sides of 3,3, and 5.
The uncle of Scalene
Yes
60
base x height divided by 2
The 3 interior angles add up to 180 degrees
Yes. If it has a 90deg angle and 2 45 deg angles it will be.
Circle = Circumferance. Triangle = Perimeter. Perimeter for a Triangle, you count up the number of units on it.
Because the 3 interior angles of any triangle always add up to 180 degrees.
You cannot have an isosceles trinangle with 60 degrees sides
Here is a website that has formulas for area for several shapes: http://www.mathsisfun.com/area.html Hope this helps! :)
the formula for the area of a triangle is A=1/2(bh) Where A is area, b is the base, and h is the height(or altitude).
The formula to find the area of a dodecagon (12-sided polygon) is (apothem x perimeter)/2.