We are required to show that the pair of polygons is similar. We can do this by showing that the ratio of corresponding sides is equal and by showing that corresponding angles are equal.
We are given the angles. So, we can show that corresponding angles are equal.
All angles are given to be 90
and
We first need to see which sides correspond. The rectangles have two equal long sides and two equal short sides. We need to compare the ratio of the long side lengths of the two different rectangles as well as the ratio of the short side lenghts.
Long sides, large rectangle values over small rectangle values:
Short sides, large rectangle values over small rectangle values:
The ratios of the corresponding sides are equal, 2 in this case.
Since corresponding angles are equal and the ratios of the corresponding sides are equal the polygons ABCD and EFGH are similar.
If two pentagons ABCDE and GHJKL are similar, determine the lengths of the sides and angles labelled with letters:
We are given that ABCDE and GHJKL are similar. This means that:
and
We are required to determine the
,
,
and
, and
,
and
.
The corresponding angles are equal, so no calculation is needed. We are given one pair of sides
and
that correspond.
so we know that all sides of
are 1,5 times smaller than
.
Working in pairs, show that all equilateral triangles are similar.
Polygons-mixed
Find the values of the unknowns in each case. Give reasons.
Find the angles and lengths marked with letters in the following figures:
Investigation: defining polygons
Investigate the different ways of defining polygons. Polygons that you should pay special attention to are:
Isoceles, equilateral and right-angled triangle
Kites, parallelograms, rectangles, rhombuses (or 'rhombi'), squares and trapeziums
Things to consider are how these figures have been defined in this book and what alternative definitions exist. For example, a triangle is a three-sided polygon or a figure having three sides and three angles. Triangles can be classified using either their sides or their angles. Could you also classify quadrilaterals in this way? What other names exist for these figures? For example, quadrilaterals can also be called tetragons.
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
