Question
Find the area of the triangle defined by the points
and
.
9
16
18
4.5
QUESTION 3
Which shapes have the same area?
II.
III.
They all have different areas
II and III
I, II and III
I and II
9
16
18
4.5
III.
They all have different areas
II and III
I, II and III
I and II
Ask by Fernandez Norton. in the United States
Jan 24,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Question 2:
The area of the triangle is 9.
The area of the triangle is 9.
Question 3:
Shapes I and II have the same area.
Shapes I and II have the same area.
Solution
Let’s address each question one by one.
Question 2
Find the area of the triangle defined by the points
, and
.
Options:
- 9
- 16
- 18
- 4.5
Solution:
-
Identify the Base and Height:
- Points
and lie on the same horizontal line ( ), so can serve as the base. - Length of base
: - The height is the vertical distance from point
to the line :
- Points
-
Calculate the Area:
Answer: 9
Question 3
Which shapes have the same area?
Given Shapes:
- I. Points
- II. Points
- III. Points
Options:
- They all have different areas
- II and III
- I, II and III
- I and II
Solution:
-
Shape I:
- This is a rectangle with length and width both equal to 3 units.
- Area:
-
Shape II:
- This is a rectangle with length 2 units and height 4.5 units.
- Area:
-
Shape III:
- This is a triangle with a base of 4 units and a height of 2 units.
- Area:
Conclusion:
- Shapes I and II both have an area of 9.
- Shape III has a different area of 4.
Answer: I and II
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Bonus Knowledge
To find the area of the triangle formed by the points
, and
, we can use the formula for the area of a triangle given by three points
,
,
:
Substituting in the coordinates, we get:
Calculating this gives:
Thus, the area of the triangle is
.
Now, for the shapes with the same area:
Calculating the areas, we find:
- Shape I is a square with side length 3, leading to an area of
. - Shape II is a rectangle with dimensions
. - Shape III is a triangle with a base of 4 (from points (4,-3) to (0,-3)) and a height of 2, resulting in an area of
.
So, shapes I and II both have the same area of 9, while shape III has an area of 4. Therefore, the correct answer is: I and II.