Three sided closed figure whose internal angles are either acute or obtuse angles called as triangles. Triangle is a very important geometrical figure will be discussed more often in elementary, middle and high schools.
Elementary school kids may study about classification of triangles by sides and angles, finding the missing angles and more; where as middle school children learn about Pythagorean theorem, area of triangles, perimeter and more.
Free triangle worksheets in this page may help you to review or practice problems based on triangles.
Classification of Triangles by its Sides:
We can classify triangles based on sides such as equilateral, isosceles and scalene. In equilateral triangle all sides are equal, in isoceles any two sides are equal where as in scalene all sides are different.
Triangles can be classified based on anlges such as acute, obtuse and right-angled triangle. In acute triangle all angles are acute; in obtuse, any one the angle is obtuse and other two angles are acute, in right angled triangle, one angle is 90 degree.
Area of triangle can be find in so many ways. More generally, we use the formula A = 1/2 * base * height. But area can also be find out for certain type of triangles even though the height is not given. Develop your skills in area of triangles by practicing these free triangle worksheets.
Area of Triangle Worksheets:
Area of triangles worksheets based on base and height is provide here. Use the formula given above to solve these worksheets.
Area of scalene triangles can be find using Heron's formula or Hero's formula. More concentration is required when you calculate in paper or calculator. Formula is provided in worksheets. These worksheets are suitable for grade 6 and up.
When the base and height of the equilateral triangle is given, then we use general formula. In case, only side of an equilateral triangle is given, use A = sqrt(3)/4 * a2, where a is the side of an equilateral triangle.