A geometric sequence has a4 = 4 and a5 = 7. What is a1 ? Your answer
1 answer:
You might be interested in
Reflection involves mirroring a point over a line.
<em>When L is reflected across the x and y axes, the new coordinates are (7,3)</em>
Given that:
When a point is reflected across the x-axis, the rule is:
So, we have:
When a point is reflected across the y-axis, the rule is:
So, we have:
Hence, the new coordinates of L are (7,3)
Read more about reflections at:
The area of the considered triangle RST is given by: Option A: 9 sq. units.
<h3>How to find the area of a triangle?</h3>If we have:
- Length of its base = b units
- Its height = h units long,
Then we get:
Area of a triangle =
The missing image is attached below.
If we take the base of the triangle as RS, then as the line UT is perpendicular to RS (as RS is parallel to x axis and UT is parallel to y axis) and touching from the base line RS to T, thus, it can be taken as height.
Thus, we have:
Area of RST = half of length of RS (base) times length of UT (height)
As visible from image, we have:
Length of RS = 6 blocks of unit length = 6 units
Similarly, length of UT = 3 units
Thus, we get:
Area of RST =
Thus, the area of the considered triangle RST is given by: Option A: 9 sq. units.
Learn more about area of a triangle here:
