Question

Pls answer 3b and challenge with full working out

Answer 1

Answer:

Step-by-step explanation:

Widgets

Command input  

Adjustment handleButtonContext menuDrop-down listHamburger buttonMenuPie menu

Data input-output  

CheckboxColor pickerCombo boxCycle buttonDate pickerGrid viewToggle switchList boxList builderRadio buttonScrollbarSearch boxSliderSpinnerText box

Informational  

Balloon helpHead-up display in computingHead-up display in video gamesIconInfobarLabelLoading screenProgress indicator Progress barSplash screenThrobberSidebarStatus barToastTooltip

Containers  

AccordionTree viewClient-side decorationDisclosure widgetFrame / FieldsetMenu barPanelPopoverRibbonTabToolbarWindow Window decorationWorkspace

Navigational  

Address barBreadcrumb navigationHyperlinkNavigation barVirtual desktop

Special windows  

Alert dialog boxDialog boxFile dialogInspector windowModal windowPalette window

Related concepts  

File viewerList of graphical user interface elementsLayout managerLo

Answer 2

Step-by-step explanation:

3b (i) The sum of interior angle and exterior angle of a regular polygon is 180°

so, exterior angle = 180° - 160° = 20°

(ii) If the interior angle of a regular polygon is 160 degrees, then the exterior angle is 20 degrees. The sum of all exterior angles is 360 degrees so there must be 360/20 sides = 18 sides.

(iii) The sum of the angles of a polygon is given by the formula:

(n-2)(180)

where n is the number of sides, which in this case is 18.

So we will replace n with 18 and evaluate.

(18-2)(180) = (16)(180) = 2880°

Challenge:- we know that sum of all angles of quadrilateral is 360°.

now, $2x + x + 20 + 2x - 10 + 3x + 30 = 180$°

   ⇒ $8x + 40 = 180$°

   ⇒ $8x = 180 - 40$

   ⇒ $x = \frac{140}{8}$

   ⇒ $x = 17.5$°

now, 1st angle = 2 × 17.5 = 35°

2nd angle = 17.5 + 20 = 37.5°

3rd angle = 2 ×17.5 - 10 = 35 - 10 = 25°

4th angle = 3 × 17.5 + 30 = 35 + 30 = 65°

and, Smallest angle = 2x - 10 = 25°

hope it will help you.