Answer: for the first one is the second one
for the next one is the last one
3O=12/3 Divide both sides by 3.
/3
O=4
<span>
♢+2=5(4)
</span><span>♢+2=20
</span> -2 -2 Subtract 2
<span> ♢=18
</span>
2(4)+18=2∆
8+18=2∆
26=2∆
/2 /2 Divide by 2
∆=13
Answer:
A person standing on the bank of the river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60
∘
.When he was 40m away from the bank he finds that the angle of elevation to be 30
∘
.Find
(i) the height of the tree.
(ii)the width of the river,correct to 2d.p
9514 1404 393
Answer:
a) MBE; b) EBY; c) MBY; d) MBE; e) YME; f) XEW; g) EBM, EBY; h) EBY, EBM
Step-by-step explanation:
There are many choices here. We'll use choices that make as much use as possible of the same points and segments.
a) ∠MBE is an acute angle
b) ∠EBY is an obtuse angle
c) ∠MBY is a straight angle
d) ∠MBE is an angle with vertex B
e) ∠YME is an angle with side MY
f) ∠XEW is another name for ∠BER
g) ∠EBM and ∠EBY are adjacent angles
h) ∠EBY and ∠EBM are supplementary angles
__
<em>Additional comments</em>
An acute angle measures less than 90°; an obtuse angle measures more than 90°. A straight angle measures exactly 180°. A linear pair is a pair of adjacent angles that together measure 180°. That is, they are supplementary and combine to make a straight angle. (Supplementary angles only need to have a sum that is 180°. They do not need to be a linear pair. However, in a figure like this, where angle measures are not marked, angles are guaranteed to be supplementary only if they are a linear pair.)
on the sixth day 46 - 16 = 30 30/5 = 6
or
16+5 =21
21+5 = 26
26 + 5 =31
31+5 = 36
36 +5 =41
41 +5 = 46
