Question
What is the main source of energy for the
Earth?Solution
The Sun is the primary source of energy for Earth, providing light and heat necessary for life and various ecological processes.
In ∆ABC , G is the centroid , AB = 5 cm, BC= 8 cm and AC = 7 cm , find GD, where D is the mid-point of BC?
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In ∆ABC, AB = 5cm, BC = 6cm and AC = 10cm then find out the value of cos A?
The lengths of three medians in a triangles are 6 cm, 8 cm, 10 cm. What is the area of that traingle (in cm 2 )?

If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 54 cm 2 , then the area of ∆BGD is?