At first I thought the answer should be C.
but then it is A , but I am sure I would have got it wrong if I hadn't seen the OA
the area of the shaded region will be 1/2 * the area of the rectangle. Always.
just suppose any value x and l-x for the bases of the triangles and you will always get 1/2 * the area of rectangle
TWO TRIANGLES IN A RECTANGLE
This topic has expert replies
Source: Beat The GMAT — Data Sufficiency |
-
tohellandback
- Legendary Member
- Posts: 752
- Joined: Sun May 17, 2009 11:04 pm
- Location: Tokyo
- Thanked: 81 times
- GMAT Score:680
-
gauravgundal
- Master | Next Rank: 500 Posts
- Posts: 199
- Joined: Mon Apr 06, 2009 4:15 am
- Location: India
- Thanked: 13 times
Yes OA A
We know the area of Rectangle =54
Just concentrate on the unshaded part of the Rectangle ,the unshaded part is nothing but a triangle whose area = (1/2)* base *height
The (base* height) is nothing but the area of rectangle.
Thus the area of unshaded portion = Area of rectangle -
(1/2) Area of rectangle
We know the area of Rectangle =54
Just concentrate on the unshaded part of the Rectangle ,the unshaded part is nothing but a triangle whose area = (1/2)* base *height
The (base* height) is nothing but the area of rectangle.
Thus the area of unshaded portion = Area of rectangle -
(1/2) Area of rectangle
-
karthik151984
- Newbie | Next Rank: 10 Posts
- Posts: 3
- Joined: Fri Sep 05, 2008 1:29 am

















