Advertisements
Advertisements
Question
If area of a triangular piece of cardboard is 90 cm2, then the length of altitude corresponding to 20 cm long base is ______ cm.
Advertisements
Solution
If area of a triangular piece of cardboard is 90 cm2, then the length of altitude corresponding to 20 cm long base is 9 cm.
Explanation:
We know that,
Area of triangle = `1/2` × base × height
90 = `1/2` × 20 × height
Height = 9 cm
APPEARS IN
RELATED QUESTIONS
Find the values of k for which the points A(k + 1, 2k), B(3k, 2k + 3) and (5k – 1, 5k) are collinear.
If the points P(–3, 9), Q(a, b) and R(4, – 5) are collinear and a + b = 1, find the values of a and b.
The coordinates of A, B, C are (6, 3), (–3, 5) and (4, – 2) respectively and P is any point (x, y). Show that the ratio of the areas of triangle PBC and ABC is
In each of the following find the value of 'k', for which the points are collinear.
(7, -2), (5, 1), (3, -k)
If area of triangle is 35 sq. units with vertices (2, −6), (5, 4) and (k, 4), then k is ______.
If G be the centroid of a triangle ABC and P be any other point in the plane, prove that PA2+ PB2 + PC2 = GA2 + GB2 + GC2 + 3GP2.
If the centroid of ΔABC having vertices A (a,b) , B (b,c) and C (c,a) is the origin, then find the value of (a+b+c).
The area of a triangle with vertices (a, b + c), (b, c + a) and (c, a + b) is ______.
Find the value of m if the points (5, 1), (–2, –3) and (8, 2m) are collinear.
Triangles having the same base have equal area.
