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scoray [572]
3 years ago
13

What is the ninth triangular number?

Mathematics
1 answer:
earnstyle [38]3 years ago
5 0
27 I think..... Oh darn I'm replying to my self
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The diagram below shows the rectangle PLUM.
Illusion [34]

Answer:

Area of rectangle PLUM = 75.00 square units

Step-by-step explanation:

Since diagonal of rectangle divides the rectangle into two equal triangles,

Therefore, area of the rectangle PLUM = 2× area of triangle PLM

By the mean proportional theorem,

In ΔPLM,

AP² = AM × AL

6² = AM × 8

AM = \frac{36}{8}

AM = 4.5 units

Area of PLM = \frac{1}{2}(\text{Base})(\text{height})

                     = \frac{1}{2}(ML)(AP)

                     = \frac{1}{2}(8 + 4.5)(6)

                     = 12.5 × 3

                     = 37.5 units²

Now area of rectangle PLUM = 2×37.5 = 75 units²

Therefore, area of the rectangle is 75.00 square units.

3 0
3 years ago
PLEASE help me I beg you
Likurg_2 [28]

Answer:

:

pls, don't do that

Step-by-step explanation:

3 0
2 years ago
Solve the inequality (-3,-3) (3,-1) on a graph
Firdavs [7]
The first number is x axis while the second is y

5 0
3 years ago
Find the measure of angle x
Deffense [45]

Explanation is in the file

tinyurl.com/wpazsebu

7 0
2 years ago
37 is ____ % of 148;
stiks02 [169]
37     ?%
---- = ----
148  100

37*100=3700
             --------- =  25% <---hope this helps
               148
6 0
3 years ago
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