You cannot, because you have no information on the shape: is it a 2-d triangle or a 3-d cuboid?
Draw a right angled triangle with legs of 4cm and 6cm
3cm
# #
It is an equilateral triangle
An isosceles triangle.
Yes
5cm
5cm
No because the given dimensions don't comply with Pythagoras' theorem for a right angle triangle.
A scalene triangle
the equation for area is area = length * width. area = 3cm*4cm. Area = 12cm^2
1/2*4*3 = 6 square cm
5 cm
The triangle with sides measuring 3cm, 4cm, and 5cm is a right triangle. This can be determined by applying the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. In this case, 3^2 + 4^2 = 5^2, confirming that the triangle is a right triangle.
The area of triangle is : 8.0
The area is 12 cm2.