which one of these is correct.
29.25cm
19.5cm
11.8cm
23.625cm
2007-02-27 02:56:25 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
since a triangle's area is 1/2 * b * h,
1/2 * 4.5 * 5.25 = 2.25 * 5.25 = 11.8125 = 11.8
2007-02-27 02:58:56 · answer #1 · answered by TankAnswer 4 · 0⤊ 0⤋
Area= 1/2*base*height
Area=1/2*4.5*5.25
Area=11.8125cm(squared)
2007-02-27 11:00:16 · answer #2 · answered by Eranga D 2 · 0⤊ 0⤋
the general formula for the area of a triangle is
bh/2 b = base width h = height
==>
(4.5*5.25)/2=11.8125 (11.8)
2007-02-27 11:00:32 · answer #3 · answered by ICE-D 2 · 0⤊ 0⤋
A = (1/2)bh
A = (1/2)(4.5)(5.25)
A = 11.8125
2007-02-27 10:59:24 · answer #4 · answered by Bhajun Singh 4 · 0⤊ 0⤋
AREA=1/2*BASE*HEIGHT
AREA=1/2(4.5*5.25)
AREA=11.8125 sq.cm
2007-02-27 11:01:52 · answer #5 · answered by satwik 2 · 0⤊ 0⤋
11.8 cm is the area of the triangle.
2007-02-27 11:01:02 · answer #6 · answered by emaciated asian chick 4 · 0⤊ 0⤋
1/2BH.. is the formula... so 1/2 of b is 2.25
and multiply by H.. 5.25.. = 11.81 or 11.8cm
2007-02-27 11:01:00 · answer #7 · answered by c_leoo 4 · 0⤊ 0⤋
Because it's an equalateral I did this:
4,5 x 5,25 / 2 = 11,8cm.
2007-02-27 11:01:37 · answer #8 · answered by Kate 3 · 0⤊ 0⤋
11.8 (.5)(BASE X HEIGHT) = AREA
2007-02-27 11:00:14 · answer #9 · answered by Soncho 1 · 0⤊ 0⤋