Author Archives: Mr. M

Lines and Angles and Symmetric Extrude

Step 1) Open up a new document.

Step 2) Create a line of length 2 from the origin and line of length 3 from the origin; something like . Their exact angle doesn’t matter, just something like :

Step 3) Create a 45 degree angle between the 2 line segments:

Step 4) Connect the end points with a tangent arc:

Step 5) Dimension the center of that arc with the point of top line as shown:

Step 6) Create an inscribed circle as shown :

Step 7) Create a symmetric extrude

Step 8) Finished product. Notice how the symmetric extrude goes up and goes down:

Advanced Parts Design Tips I

Step 1)

lines should be larger on right side

Step 2) Make the blue lines symmetric to the construction line

Step 3) Click on the top line and construction and dimension the 1.5 degree angle

Step 4) dimension the 2 left side points to 1.5

Step 5) Resulting picture :

SUPA APA 2025-26

Array Loops

Objects

Array Fun 2 [2025]

Complete all the methods below. When you are done, copy and paste the testmethods.v5.1 into your class and run it to see if you have any obvious errors. The above code does not guarantee you a 100 but will help catch most of the common errors that students make.

Note: You may not use any external libraries (like Java.Arrays etc )or import any code. Everything can be done with just loops and variables.

int sumEveryN(int[] nums, int n)

Description:This method returns the sum of every n elements of nums ..

Method Call	return value/output
sumEveryN( {1 , 2 , 3 , 4 }, 2 )	4( ie 1 +3)
sumEveryN( {13 , 42, 15, 33 , 44 , 16 , 52} ,3)	98 ( ie 13 + 33+ 52)

String[] doubleArr(String[] strs)

Description: This method returns a new version of strs in which each element now appears twice. This can be done with a for-each loop, which I believe is easier and more intuitive.

Method Call	return value/output
doubleArr( {“a”,”b”,”c”} )	{“a”,”a”,”b”,”b”, “c” , “c”}
doubleArr( {“math”,”ware”,”house”,”.com” })	{“math”,”math”,”ware”,”ware”,”house”,”house”,”.com”, “.com”}

int indexOf5(int[] nums )

Description:This returns the index of the first occurrence element 5 or -1 if 5 does not appear anywhere in the array.

Method Call	return value/output
indexOf5( { 2 , 3 , 5 , 4 } )	2
indexOf5( { 2 , 3 , 5 , 4, 5 } )	2
indexOf5( { 2 , 3 ,7 , 4, 3, } )	-1

More Sample calls and return vals

int indexOf(int[] nums, int num)

Description: This method returns the index value of the first appearance of num or -1 if num is not an element of nums .

Method Call	return value/output
indexOf( {6,4 ,7,3, 4 }, 4)	1
indexOf( {6,4 7 ,3,2,7}, 7)	2
indexOf( {6,4 ,2,3}, 22)	-1

int[] randos(int start, int end, int howMany)

Description: This method returns an array of random numbers between [start,end] . Note make sure that each element in the new array attempts to make a new random int. Use Math.random() , do not use any other mechanism for finding a random number.

More example calls and returns :

double meanBetween(int[] nums, int min, int max)

Description: This method returns the mean of nums ; however, this method only counts values within the range (min,max) as shown in the examples below: