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DaniilM [7]
3 years ago
14

The altitude of a triangle is 2 m longer than its base. What are the dimensions of the altitude and the base if thearea of the t

riangle is 40 m^2?
Mathematics
1 answer:
HACTEHA [7]3 years ago
8 0

Step-by-step explanation:

Let base of triangle be x m.

Therefore, altitude =( x + 2)m

area \: of \:  \triangle =  \frac{1}{2}  \times base \times altitude \\  \\ 40 =  \frac{1}{2}  \times x \times (x + 2) \\  \\ 80 =  {x }^{2} +2x \\  \\   {x}^{2}  + 2x - 80 = 0 \\  {x}^{2}  + 10x - 8x - 80 \\ x(x + 10) - 8(x + 10)  = 0\\ (x + 10)(x - 8) = 0 \\ x + 10 = 0 \:  \: or \:  \: x - 8 = 0 \\ x =  - 10 \:  \: or \:  \: x = 8 \\ base \: can \: not \: be \:  - ve \\ x \neq - 10 \\ x = 8 \\ x + 2 = 8 + 2 = 10 \\

Therefore

Altitude = 10 m

Base = 8 m

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