If A Triangle Has A Base Of 4.5 Mtrs And A Height Of 2.5 Mtrs What Is Its Area And How?

If a triangle has a height of 12 in. And a base of 5 in., what is its area?

    A. 90 sq. In.
B. 30 sq. In.
C. 60 sq. In.
D. 45 sq. In.