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### Grade 5 - Mathematics8.6 Finding the Area/Perimeter of Triangles

 If a triangle has a base b units and height of h units, then The area A is 1/2 base x height. The perimeter is the sum of lengths of all the three sides side1 + side2 + side3. A = 1/2 (b x h) P = a + b + c Example: A triangle has a base of 3 ft and height of 5 ft. Find the area of the triangle. Area of triangle = (b x h) / 2 Substituting the values b = 3 and height = 5 (3 x 5)/2 = 15/2 Answer: 7.5 square feet Note: The units of area are square feet or ft2. Directions: Find the area for the following questions. Also write at least 5 examples of your own.
 Q 1: Find the AREA of a TRIANGLE, Base = 9 inches, Height = 6 inches272528 Q 2: A triangle has a base of 6 ft., a height of 5 ft. and sides of 6 ft. Find the area of the triangle.253028 Q 3: Find the PERIMETER of an EQUILATERAL TRIANGLE, Side = 8 inches183224 Q 4: Find the PERIMETER of an EQUILATERAL TRIANGLE, Side = 10 inches163029 Q 5: Find the PERIMETER of an EQUILATERAL TRIANGLE, Side = 9 inches272425 Q 6: What is the area of a triangle with base 4cm and height 2cm6 square cm2 square cm4 square cm Q 7: The formula for area of a triangle with base b and height hA = 2(b + h)A = b x hA = (b x h) / 2 Q 8: In the formula A = (b x h) / 2 the h is the height of the triangle measured as perpendicular distance from the vertex opposite the base to the line containing the base.truefalse Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!